engleski

Layered model of crack growth in concrete beams in bending

Fracture properties of various types of concrete, like plain or fiber reinforced concrete are determined in 3-point bending ex- periments resulting in a force-displacement diagram. Standard properties of concrete are then determined using technical norms. However, post- peak behavior of concrete, including crack propagation, cannot be described using standard properties. Authors are developing nonlinear, stochastically based material model for concrete to describe post-peak concrete behavior together with crack propagation. One of the most desirable properties of the model is its suitability for later in-verse analysis and parameter determina- tion. Model is based on moment – curvature (m-κ) relation and layered approach to discretization. In this work, we are presenting the basic properties of the model and its ability to capture the phenomena of interest (proof of concept).

bending behavior ; force-displacement ; post-peak behavior ; crack propagation ; fracture ; stochastically based model

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